Home / 1,040.30-1,560.68-391.04

Finding the Fourth Proportional to 1,040.30, 1,560.68 and 391.04

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Solution

The fourth proportional to 1,040.30, 1,560.68 and 391.04 is: 586.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,040.30 : 1,560.68 = 391.04 : x
  2. Step 2: Convert to fraction form
    1,040.30/1,560.68 = 391.04/x
  3. Step 3: Cross multiply
    1,040.30x = 1,560.68 × 391.04
  4. Step 4: Simplify right side
    1,040.30x = 610,278.55
  5. Step 5: Solve for x
    x = 610,278.55/1,040.30
  6. Step 6: Final answer
    x = 586.64

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.